I am currently swapping the electric 4x4 system from a 1995 blazer into a 1998 bravada, I have everything swapped over and most the wiring compete for the electrics, I have 2 questions. The switch on the cable for the front diff does anybody know where I need to wire that into? I seem to remember the 4x4 not work on the blazer with that switch unplugged so I assume it's sending a signal somewhere. And on the tccm is a grey wire, diagrams just say pcm on it and was wondering if anybody knows if that wire is necessary to connect. Any body who has done a similar conversion I would appreciate your advice thank you

 

You would be better off keeping the one-piece Bravada axel on the passenger side, along with the tube rather than swapping in the Blazer one. You don't need to wire in the Bravada axel that way. Cut the plug off and connect the two wires together. I'm not sure what you mean by a switch, though. I don't have a clue about about a grey wire to the PCM, either.

 

Thank you for your reply

 

The sensor on the front differential must be properly connected; this is an essential confirmation signal. If disconnected, the TCCM may refuse engagement.

 

I have completed the entire swap as of a month ago. Everything works as it should. If anybody has any questions in doing a similar conversion I have answers.
And that sensor on the front axle I just ran keyed power to and ran it to little light I installed on by my shifter that lights up when the axle is engaged. The tccm does not rely on it for engagement

 

Congrats!

 

Thanks